Exposing an Orchestration as Web Service:
This is the safest option you can choose, when you want to expose your business process as an industry standard web service, which can later be consumed by a client (consumer) either using a web service proxy or HTTP post of correctly formatted SOAP message.
There is a very good article in MSDN http://msdn2.microsoft.com/en-US/library/ms935219.aspx explaining how you can expose your orchestration as web service.
Let's assume you h...
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